Activation energy for mullitization of gel fibres obtained from aluminum isopropoxide

Bulletin of materials science

Haihong Zhang²  Hongbin Tan¹  Yaping Ding²  Guanjun Qiao²  Jianfeng Yang² 

[1] State Key Laboratory for Mechanical Behaviour of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China$$School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong Shaanxi 723003, P. R. China$$State Key Laboratory for Mechanical Behaviour of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. ChinaState Key Laboratory for Mechanical Behaviour of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China$$School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong Shaanxi 723003, P. R. China$$School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong Shaanxi 723003, P. R. ChinaState Key Laboratory for Mechanical Behaviour of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China$$School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong Shaanxi 723003, P. R. China$$;State Key Laboratory for Mechanical Behaviour of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China$$State Key Laboratory for Mechanical Behaviour of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. ChinaState Key Laboratory for Mechanical Behaviour of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China$$

关键词: Mullite;    fibres;    solâ€�?�gel method;    activation energy.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Gel fibres of mullite precursor were prepared from an aqueous solution of aluminum nitrate (AN), aluminum isopropoxide (AIP) and tetraethylorthosilicate (TEOS). A 4:1 molar ratio of aluminum isopropoxide and aluminum nitrate was optimized to obtain spinnable precursor sol for synthesis of fibres. Thermogravimetry�?�differential scanning calorimetry (TG�?�DSC), Fourier transform infrared (FTIR) spectra and X-ray diffraction (XRD) analyses were used to characterize properties of the gel and ceramic fibres. The precursor gel completely transformed to mullite at 1200 °C. The activation energy of mullite crystallization was 993.5 kJ/mol by the Kissinger equation.

【 授权许可】

Unknown